Patent GB-219400-A (GB)
Title: The automatic locking and unlocking of railway carriage doors and doors of vehicles, such as motor cars, taxi-cabs, tradesmen's vans
IPC: A47B37/04
Filed: 1923-04-26
Abstract: 219,400. Moran, J. April 26, 1923. Railway-carriage doors and the like, fastening automatically.-The doors of a railway-carriage &c. are fastened automatically by the initial movement of the wheels, a centrifugal governor being caused at the same time to diverge to maintain the doors in the locked position by special mechanism provided on the carriage axle, the governor, when the train has attained a certain speed, however, acting under centrifugal force. The bar 2, Fig. 1 is moved longitudinally against a spring to effect the locking of the doors by movement of a lever 17 pivoted in a bracket 18 and at 19 to the bar 2 and connected by a lever 16 to a stud 9, in members 6 freely mounted on the axle 4, to which is pivoted a catch 7 adapted to be moved as the wheel rotates in direction of arrow y by a snug 8 on a. member 5 which rotates with the axle. The catch 7 is forced away from the snug 8 against a spring 14a after the bar 2 has been moved to locking position by cams 10 pivoted to the catch 7 engaging the peripheries of the members 6. A ratchet wheel 22 mounted on a spindle 21 in brackets 20 is rotated, through levers 29, 30 connected to the pivot 19, as the bar 2 moves longitudinally and is held against backward movement by a pivoted pawl 28 which is caused to engage therewith by movement of the levers 27, 26, 25 and 24 which connect it with a lever 23 also mounted on the spindle 21. Mounted on the pivot rod 41 of the lever 25 is a second lever 42 carrying a runner 43 which engages over the upper side of an additional locking lever 32 connected by levers 33, 34 to the stud 9. The levers 26, 27 are held in their raised position to maintain the pawl 28 in engagement with the ratchet wheel 22 by a lever 45 which has a swivel connection with their pivot stud 44 and is connected by levers 46, 47 to a lever 48 so as to be raised when the lever 48 is pulled to the left, Fig. 3, by the member 86, connected by lever 85 to a pivoted lever 97 adapted to be actuated by movement of the governor collar 96. The collar 96 is caused to move inwardly along the axle 4 by levers 93 having weighted ends 94 which fly out against the action of springs 95 as the axle revolves. As, however, the governor does not begin to operate by centrifugal force until the train has attained a certain speed, additional mechanism is provided which is actuated as soon as the train starts to cause the governor weights 94 to diverge and act through the mechanism above described to raise the lever 45. This additional mechanism comprises an oscillatable bracket 111, Figs 5 and 14. pivoted by a shaft 112 to a fixed bracket 113 and carrying rotatable shafts 100 provided with spur wheels 99, 99<a> meshing with a spur wheel 98 fixed on the axle 4. The shafts 100 also carry worms 114, 114<a> one of which, when the bracket 111 is tilted as shown in Fig. 14 by revolution of the axle 4, is caused to mesh with a disc 115 fixed to a sleeve 116 connected to the governor collar 96 so that as the disc 115 is moved by the worm 114a the weights 94 are caused to diverge. When the governor begins to operate effectively by centrifugal force, the disc 115 is held clear of the worms 114, 114<a> to avoid unnecessary wear. On the train slowing down, the springs 95 cause the disc 115 to re-engage the worm 114 or 114<a>, and when the train stops, the bracket 111 is restored to its vertical position and the pawl 28 is released first by the pulling down of the lever 45 and finally by the spring controlling the bar 2, thus allowing the ratchet wheel 22 to rotate back to its normal position and the bar 2 to be restored to its normal position by its spring, thus unlocking the doors. When the train travels in a reverse direction to arrow y, Fig. 1, the snug 8 merely rides beneath the catch 7 and a similar arrangement is provided on another wheel axle 51, Fig. 9, to effect the movement of the bar 2. In this case, the catch 7<a>, pivoted to the stud 9<a> on the member 6a, is moved by the snug 8<a> on the member 5<a> to move the bar 2 against its spring - through levers 64, 63. The catch 7a is released from the snug 8<a> after a certain time by engagement of the spring-controlled pivoted arms 56 with the spring-controlled lever 52. The lever 52 is prevented from releasing the catch 7a too soon by being lifted a certain distance by the spring-controlled catch 61 pivoted in the pivoted member 58 connected by the link 62 with the lever 63. The bar 2 is provided with projections 75, Figs. 1 and 6, which engage an arm 74 on a rotatable rod 73 which carries an arm 72 having a stud 71 sliding in a slotted link 70 to which one end of a pivoted lever 67 is connected, the other end of the lever 67 being connected to the spring- pressed bolt 3. Movement of the bar 2 against its spring when the train starts allows the bolts 3 to be shot by their springs 49. The stud 71 sliding in the link 70 allows any individual bolt 3 to be withdrawn by hand or foot by depression of the projection 77, Fig. 7, on the bolt. In order to prevent the spring 49 shooting the bolt 3 until the door is shut, a pivoted lever 78, Fig. 7, connected by a spring-controlled rod 80 to a pivoted lever 81 having a projection 82 extending into the doorway, is provided which engages over the projection 77 to hold the bolt 3 withdrawn until moved clear thereof by the door, in shutting, pressing in the projection 82.